How to create the popup to click from an image or title?

Hi,
This plugin is perfect for me I just want to know instead of having a clickable read more button, I would like to have it when you click on an image (or the name below the image) in the gallery a non blockable text popup appears? Is this possible somehow??

Also I would like the name under the image to be aligned centre. and lastly, the popup is too large and I would like it to be moved down. Viewers can not see the top of the popup as seen on the bottom link I provided to gallery page.